Cold Rolled Steel Sheets Directly Wholesale from China

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China main port
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TT OR LC
Min Order Qty:
20 m.t.
Supply Capability:
1000 m.t./month

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Item specifice:

Grade: 1000 Series,2000 Series,7000 Series,6000 Series,5000 Series,4000 Series,3000 Series Surface Treatment: Powder Coating,Sand Blasted,Holographic Impression,Composited,Printed,Brushed,Enameled Wire,Oxidized,Color Coated,Mill Finish,Polished,Anodized,Embossed,Coated Shape: Round,T-Profile,Square,Angle,Hexagonal,Oval,Rectangular,Flat
Temper: Hard,Half Hard,Soft,T351-T851,T351-T651,O-H112,T3-T8 Application: Insulation Material,Liner & Wad,Pharmaceutical,Kitchen Use,Food,Glass Wall,Transportation Tools,Heat Sink,Door & Window,Decorations,Label & Tag,Seal & Closure

Product Description:

Product Description:

 

General Information of Cold Rolled Steel Sheet

 

The raw material of cold rolled steel sheet is high quality hot rolled product, and after pickling, continuous rolling, degreasing, annealing, skin pass, slitting and cut to length line etc. Along with it many kinds of new technology and new process of global cold rolling production have been applied. Therefore the quality of the goods could be guaranteed. The finished product has a variety of excellent capabilities, such as processing capability and smooth, flat surface. It’s widely used in outdoor and interior decoration, furnishing manufacturing, home appliance, automobile etc.

 

 

Specifications of Cold Rolled Steel Sheet

 

1) Grade: SPCC, SPCD, SPCE, DC01-06, St12, Super deep drawing

 

2) Standard: JIS G3141-1996, EN 10131-2006, DIN EN 1002

 

3) Thickness: 0.20mm - 3.0mm

 

4) Width: 600/1000/1250/1500 (mm) or per customer's request

 

 

Package of Cold Rolled Steel Sheet

 

Strapped with min three strapping strips, covered by anti-water paper and plastic film, fixed on the iron or wooden pallets by strapping strips and covered by plastic bag to prevent damage from transportation.

 

 

Applications of Cold Rolled Steel Sheet

 

1) For the further producing of hot dip galvanized steel products

 

2) Cold rolled Steel: Auto manufacture, Oil drum, Transformer's tank panel, Furniture etc.

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Cold Rolled Steel Sheets Directly Wholesale from China

Cold Rolled Steel Sheets Directly Wholesale from China

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Q:why does the bubble apear a few minutes later after putting aluminum sheet into dilute sulphuric acid?
Because there is oxide on the surface of aluminum, the reaction will be quicker after polishing the oxide with abrasive paper.
Q:which kind of material won't influence magnet attracting iron nail? Does copper sheet or aluminum sheet influence it?
Copper coil will impede magnetic penetration. People separate the magnet from the workpiece of machine tool to avoid magnetic short circuit and attraction loss, making magnetic line of force go through the workpiece. An opening copper bush is added into the iron core of magnetic closing coil or opening solenoid to avoid the iron core being attracted on the external iron piece and stop operation. The opening is for avoiding eddy formulation and short circuit, iron core in copper bush is the ruled magnetic circuit.
Q:How to press multilayer aluminum sheets (aluminum sheet's thickness: 0.2mm) together and keep them inseperate after pressing?
resistance welding usually overlays two pieces together and presses them, heating them to melting state through current, you can try multiple sheets.
Q:Could copper wire be welded with aluminum sheet?
Copper wire could be welded with aluminum sheet, and it needs to use low temperature welding method, if copper wire is in the unit of millimeter and aluminum sheet is also in the unit below 1 mm, you can use electric soldering iron to heat it as hybrid welding and choose low temperature welding materials, you can use WEWELDING M51 welding wire and M51-F flux to complete welding. As for the large aluminum sheet, you can take liquefied gas multihole lance as heat source, then choose the same low temperature materials as welding materials, you can use WEWELDING M51 welding wire and M51-F flux to complete welding. Welding fundamentals of these two welding methods: both of them are use heatable heat source to heat the matrix to 179 degree, the melting point of WEWELDING M51, then use matrix’s heat conduction to melt welding wire, completing welding. The process of melting welding wire is the process of smearing the welding wire with flux into welding area, melting welding wire completely depends on matrix’s heat conduction.
Q:after putting aluminum sheet into the area between magnet and iron products, could magnet attract iron again?
magnet can attract iron if the aluminum sheet isn't too thick. Because aluminum can't cut off magnetic line of force, unless aluminum sheet's thickness surpass the range of magnetic attraction.
Q:How to polish aluminum sheet to be bright?
you must do some protection work, or you will fail once aluminum contacts air. Aluminum sheet is easy to be oxided and volatilized.
Q:is aluminum foil spacer poisonous after heating?
It’s a kind of thermoprint material made by pressing the aluminum into sheet, and owing to its similar thermoprint effect to silver foil, so it’s called fake silver foil. Aluminum has soft texture, good ductility, and is silver white, if we use sodium silicate to paste the sheet after pressing on the offset paper, making aluminum foil, the foil can be printed. But aluminum foil is easy to be oxidized and darkens, rubbing and touching will make it darken, so it doesn’t suit for the thermoprint of books’ cover that needs to be preserved for a long time.
Q:can the oxide film on the surface of aluminum sheet prevent the erosion of acid liquid? Why?
yes, acid can react with aluminum oxide , generating salt and water, but its anti-corrosion will be stronger if oxide film on the surface is enough dense.
Q:what's the oxidation method of positive pole on the surface of aluminum sheet?
Do chemical polishing again, oxidation time is about 40 – 90 minutes, after finishing all of these, you can conduct positive pole oxidation, choose sulfuric acid solution in normal situation, pretreatment is very important in the whole process, take stereo as negative pole, firstly, use the solution mixed of carbonate-bicarbonate and detergent to heat and clean its surface, pretreat the aluminum sheet, dyeing according to requirement after oxidation, then remove the oxide film with oxide film removal solution, place aluminum sheet on the positive pole, finally closing it in the boiling water for about 15 minutes.
Q:How to distinguish aluminum sheet from magnesium sheet?
seperately put aluminum sheet and magnesium sheet into NaOH solution, the one generating bubble is aluminum sheet, because aluminum sheet will react with strong base , generating hydrogen.

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